A standard penetration test is carried out in sand where the efficiency of the hammer nH =70%. If the measured N-value at 30 ft depth is 24, find N60 and (N1)60. The unit weight of the sand is 115.0 lb/ft3. Assume nB = nS = nR =1.

A standard penetration test is carried out in sand where the efficiency of the hammer nH =70%. If the measured N-value at 30 ft depth is 24, find N60 and (N1)60. The unit weight of the sand is 115.0 lb/ft3. Assume nB = nS = nR =1.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.14P

See similar textbooks

Related questions

Q: For the beam loaded as shown in Fig.1. knowing that the bending moment at the center of the beam is…

Q: Trapezoidal section Q=120 m³/s S = 12 cm/km, Side slope 2:1, n=0.0182 Compare the dimensions for two…

A: Answer : (1) Let us first calculate the dimensions using the given data for the trapezoidal section…

Q: 2-118. Determine the angle between cables AB and AC. X FY 1m 0.75 m B 1 m 3 m Probs. 2-117/118 COC…

A: Given data:- Below figure is given in question,

Q: supported beam as shown, with an allowable flexural stress of 15MPa, determine the following: 1.…

Q: 1-Calculate maximum axial stress in the cross section shown below in ksi, if M="see above". Please…

A: Given data:- M = 750

Q: Draw the shear, axial and bending moment diagram for the frame shown. rit exist of son 30 k 1.5 k/ft…

A: Given data Draw axial, shear and moment diagram.

Q: Q-5 The mechanical widening of a curve is 1.5m, the curve is having a radius of 120m and design…

A: given- mechanical widening=1.5 mradius of curve=120 mdesign speed=80 kmph

Q: Determine the sum of the moment of the forces about point O shown .

A: Given data:

Q: Please complete in the table format and I really need help with this. Please

A: Time Elapsed (Sec) Hs (g/L) Hc (g/L) Temp T (C) Corrected reading, R= Hs-Hc L (cm) K Particle Dia, D…

Q: Calculate the water flow through a Parshall flume with a throat width of 5 feet and a water level of…

A: Reference : Fluid mechanics, Types of Open flow channel. Parshall flume is a device or fixed…

Q: For the clevis connection shown in the figure, determine the maximum applied load P that can be…

A: Given :

Q: Problem 5 Angles AOB, BOC, and COD are measured on the same angle at point O. Determine the most…

Q: Calculate the dry unit weight, void ratio, water content and degree of saturation for a sample of…

Q: A circular plate 100 mm diameter is welded to another plate by means of 6 mm fillet weid If the…

A: Given data- Daimeter of plate d=100 mm6 mm fillet weldshear stress=10 kg/mm2To Find-The twisting…

Q: A spiral curve, 100 m long, is to be connected to a simple curve of radius 300 m. If the resulting…

Q: Part A - Support Reactions Determine the support reactions for the beam shown in the figure below. 5…

A: Given :

Q: A uniform collapsible sand stratum, 2.5 m thick, has specific gravity of its sand as 2.65, with a…

A: given- H=2.5 mG=2.65e=0.65

Q: Use 4 decimal places at all instances and box the final answers. Please write legibly Determine the…

A: Using equilibrium equation

Q: = 10 m/s a 16 m/s² 300 mm 300 mm At the instant that 0= 70° rod AB is subject to a deceleration of…

Q: 3. The box below contains the elevation of a point group (all in meters). Draw the 25-meter contour…

A: Finding out the contour line of 25 m .

Q: Whered you get "K"? I use this formula but it does not match

A: Solution: Hazen William formula: V=kCR0.63S0.54 Where, V = fluid velocity, m/s, ft/s C = factor for…

Q: 4-A cantilevered beam is 5 m long and consists of a W200 X 100 steel member. If a 90 kN concentrated…

Q: A pin-connected truss is loaded and supported as shown. Each aluminum member has a cross-sectional…

A: Given :

Q: A rectangular open channel of 6 m width is carrying a discharge of 20 m³/s. Consider the…

A: Given- Rectangular open channel- width B=6 mdischarge Q=20 m3/sg=9.81 m/s2It is needed to find the…

Q: average velocity, pressure drop,

A: Solution: ∆h = 8 cm = 0.08mρT = 860kg/m3ρHg = 13600 kg/m3 the velocity, u1 = Cv2P2-P1ρP2 - P1 = hHg…

Q: The bridge truss shown carries the following uniform live load and concentrated live load. в с DE A…

A: Solution: Given: h = 3 m B = 8 m ULL = 15 PLL = 110

Q: Explain the main distinctions between plate tectonics and continental drift theory.

A: The primary distinction between plate tectonics and continental drift is that the former refers to…

Q: Questions 5. a) A vertical crest curve has an approach grade +3% and a departure grade -2%. The…

A: Given : Approach grade = +3% and departure grade = -2% Intersection point level is 100m (AHD)]…

Q: Find the total pressure and center of pressure of a gate constructed across a channel which is 5m…

Q: Prob. 6.10-16. The beam shown in Fig. P6.10-16a is a W12 X 35 wide-flange beam. Determine the web…

Q: Compute the deflection of a structural member made of aluminum if a load of 755 N is applied to the…

A: Given data:- The given applied load, F=755 N The given length, L=250 mm The given cross-sectional…

Q: An illegal connection was detected along a water 400 mm water supply line made with cast iron pipe…

Q: Q5/ In the plan below there is a Spiral stair, the distance between slabs is 3m, there is the space…

A: Solution:-Given values are as follow The height between slabs H = 3 m The Radius R = 100 cm The…

Q: A simply supported wood beam with a span of L = 15 ft supports a uniformly distributed load of w =…

A: Given data: hb=2 Rectangular cross-section. Allowable bending stress = 1200 psi

Q: Determine the internal normal force, shear force, and bending moment in the beam at points B and C.…

A: Given :

Q: Consider a fluid of viscosity μ between two circular parallel plates radie 'R' separated by a…

Q: 15. A backfill of a retaining wall consists of y=19 kN/m³ which is 6 m high. Find the lateral earth…

A: Given data: A backfill of a retaining wall consist, Y = 19 kN/m3 Height, H = 6 m Coefficient of…

Q: -118. Determine the angle between cables AB a X A FY 1 m 0 0.75 m B O 1 m 3 m Probs. 2-117/118 OC…

Q: The rigid bar BDE is supported by two links AB and CD. Link AB is made of aluminum (E = 70 GPa) and…

Q: At an axial load of 22 kN, a 45-mm-wide by 15-mm-thick polyimide polyme bar elongates 2.8 mm while…

A: Given : Axial load - 22Kn Width - 45 mm, Thickness - 15 mm Elongation - 2.8 mm width contraction…

Q: R₁ 2 m 500 N 2 m 800 N 1 m R₂

A: Shear force is defined as the algebraic sum of all the forces acting on either side of the section.…

Q: If the peak ordinate of a 4 h unit hydrograph of a basin is 270 m³/s, then the peak ordinate of a 8…

A: Given data Peak ordinate of a 4 h unit hydrograph of a basin is 270 m3/s Peak ordinate of a 8 h…

Q: Situation: A beam has a width of 300 mm and an effective depth of 480 mm strength f'c-34 MPa. Steel…

A: Solution: Given: b = 300 mm d = 480 mm fc = 34 MPa fy = 415 MPa d'=70mm DL = 140 kN-m LL = 180 kN m…

Q: Problem 4. A. Draw the F.B.D. of the frame shown in Fig. (4-A). B.Draw the F.B.D. of the figure…

A: Let,RA=vertical reaction at roller support in upward directionRB=vertical reaction at hinge support…

Q: Prob. 6.8-10. Using the shear-stress formula, Eq. 6.67, deter- mine an expression for the shear…

A: Given data:- The free body diagram of the shear stress at the neutral axis level on the circular bar…

Q: The rated speed of a highway curve of 200 ft radius is 40 mph. If the coefficient of friction…

Q: Determine the net force needed to bring a car that is traveling at 90 km/h toa full stop in a…

A: Given data: initial speed (V1) = 90 km/h Full stop distance = 100 m mass of car = 1400 kg

Q: The ??? diagram for a collagen fiber bundle from which a human tendon is composed is shown.

A: Given : L = 6.5 inches A = 0.229 in2 To find : Determine the elongation ?

Q: Q2 The beam shown in Figure Q2 is loaded with a triangular distributed load from A to B, and a…

Q: If an astronaut and her space suit weigh 105 N on Earth, what should be the volume of her suit if…

A: Given data:- The given weight of the Astronaut, m=105 N

Question

A standard penetration test is carried out in sand where the efficiency of the hammer n_H =70%. If the measured N-value at 30 ft depth is 24, find N₆₀ and (N₁)₆₀. The unit weight of the sand is 115.0 lb/ft³. Assume n_B = n_S = n_R =1.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

= A standard penetration test is carried out in sand where the efficiency of the hammer n 50%. If the measured N-value at 7.5 m depth is 20, find Noo and (N₁)60. The unit weight of the sand is = 15 MR = 1 and 18.08 kN/m³. Assume ¹ = 0.95. If you know that: ns
A sand sample is subjected to direct shear testing. Two tests areperformed. For test 1, The sample shears at a stress of 2500 psf whenthe normal stress is 4000 psf.Test 2, The sample shears at a stress of 3500 psf when the normalstress is 6000 psf. Determine the following:a) Angle of Internal frictionb) Value of cohesionc) Compute the shear stress at a depth of 12 ft. if the unit weight ofthe soil is 150 pcf
A silty sand of density index (ID or Dr) = 59% was subjected to standard penetration tests at a depth of 3 m. Groundwater level occurred at a depth of 1.5 m below the surface of the soil which was saturated throughout and had a unit weight of 19.3 kN/m3. The average N count was 15. During calibration of the test equipment, the energy applied to the top of the driving rods was measured as 350 Joules. Determine the (N1)60 value for the soil.
The angle of friction of a compacted dry sand is 37 degrees. In a direct shear test on the sand, anormal stress of 150 kN/m^2 was applied. The size of the specimen was 50mmx50mx30mm(height) SITUATION 1 a. Compute the shearing stress Your answer b. What shear force will cause shear failure? Your answer c. Determine the shear stress at a depth of 3m if the void ratio of the soil is 0.60. Gs Of sand is 2.70
A very long steel drill pipe got stuck in hard clay at an unknown depth. The drill pipe was applied a large upward force and observed that the drill pipe came out elastically by 500 mm. It was also observed that there was elongation of 0.04 mm in a gauge length of 200 mm. Estimate the depth of hard clay bed. Following consideration may be taken into account: Resistance offered by all material/elements may be taken as zero.
In a standard penetration test in sands, the blow count measured at 14 m depth was 26. An automatic hammer released by a trip with an efficiency of 70% was used in the test. The unit weight of sand is 17.5 kN/m³. Determine: (a) N60 (N1) 60 using Peck, Hanson, and Thornburn (1974) correlation with Pa = 100 kPa. The most likely value of the friction angle (not the range). The possible range of relative density per Peck et al. (1974) The Young's Modulus. The table below presents two correlations proposed for estimating Young's Modulus. kg Leonards (1986) E .cm² E (kPa): = 8N60 = aPa (kPa)N60 Kulhawy & Mayne (1990) In the table a = 5 for fine sands, 10 for clean normally consolidated sands, and 15 for clean over consolidated sands. If a specific method is not specified, you may use any possible correlations. While doing so, you must clearly indicate which correlation was used.
Triaxial tests performed on samples of aeolin sand. The failure conditions in terms of effective stress are (ov, 0h) = (515, 100), (1250, 200), (3500, 400), and (5325, 800) kPa. Using (s, t) space, determine the cohesion and friction angle. What is the orientation of the major principal stress with respect to the failure plane? Determine this graphically.
a) Following results are obtained in a series of CU triaxial tests on saturated samples of a clay. Calculate the effective shear strength parameters (c' and ') and plotting the Mohr- Coulomb failure envelope. (Hint: you can first plot the top points of the circles in q=(01-03)/2 vs. p=(₁03)/2 space.) Test number Confining (cell) Pressure (kPa) Deviator stress (01-03) (kPa) Pore pressure before shear (kPa) Pore water pressure at failure (kPa) ● 1 400 120 300 320 2 400 210 200 260 3 550 270 250 235 b) If we carry out a consolidated drained triaxial test on a specimen taken from the same clay (assume same c', '), what would be the deviator force at failure in a specimen that is consolidated under an isotropic stress of 240 kPa and pore pressure of 300 kPa. The specimen was initially 5 cm in diameter and 10 cm in height. Peak strength (i.e. failure) is reached at axial strain of 4% and volumetric strain of 2% in compression. Hints: the pore pressure is initial pore water pressure
Q # 3. Following data are given for a direct shear test conducted on dry sand: Specimen dimensions: 63 mm x63 mm and 25 mm (height). Normal stress: 105 kN/m?. Shear force at failure: 300 N a. Determine the angle of friction, for a normal stress of 180 kN/m?. b. What shear force is required to cause failure?
The coefficient of permeability of a sand at a void ratio of 0.62 is 0.03 cm/sec. estimate the coefficient of permeability at a void ratio of 0.48. a. Using Casagrande equation b. Using kozeny - Carman equation.
Q # 3. Following data are given for a direct shear test conducted on dry sand: Specimen dimensions: 63 mm × 63 mm and 25 mm (height). Normal stress: 105 kN/m². Shear force at failure: 300 N Determine the angle of friction, for a normal stress of 180 kN/m². b. What shear force is required to cause failure? а.
A dilatometer test was conducted in a clay deposit. The groundwater table was locatedat a depth of 3 m below the surface. At a depth of 8 m below the surface, the contact pressure spod was 280 kN/m2 and the expansion stress sp1d was 350 kN/m2. Determinethe following:a. Coefficient of at-rest earth pressure, Kob. Overconsolidation ratio, OCRc. Modulus of elasticity, EsAssume s 9o at a depth of 8 m to be 95 kN/m2 and ms 5 0.35.